importing bmp or TIFF files into GRASS 4.1?

I have some TIFF files which I would like to import into GRASS 4.1. I
have scanned the users manual for an appropriate command, but didn't seem
to find one. Is it possible to import TIFF and/or bmp files into GRASS
4.1? If so, what is the appropriate command(s). Thanks for any
suggestions.

Brian